Clamp pressure control method for injection molding process
US6716374B2 · kind B2 · utility
3Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Oct 9, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/81
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection-compression molding apparatus includes a stationary mold provided with a nozzle for injecting molten resin, and a movable mold driven by a servo motor. In compressing the resin, high-speed position control of the movable mold is first performed, which is then switched to speed feedback control which enables delicate regulation of clamping pressure in accordance with pressure fluctuations in the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.